“A harder, more technical loop that can be added on the Phil's loop.
— Jeff Fox
The Stinking Springs Loop goes left off of the main Phil's loop just before dropping into the Rib Cage and loops back in to the same spot so you don't miss anything. Stinking Springs starts with a very gradual climb through sagebrush on smooth singletrack with great views of the LaPlata mountains. Shortly after reaching the "Pinnacle" you'll drop into an extremely fun descent known as the Vertebrae. Vertebrae has big banked turns, jumps and some fast straights.
At the end of Vertebrae, you'll do a mildly technical descent of the Moki downhill followed by a short grind up the Moki climb which can feel pretty tough after all of the descending. After the climb, the trail rolls and drops slightly to a section of mixed singletrack and slickrock known as the Rim. The Rim is bumpy and rocky but doesn't have any extreme technical riding. This section eats tires and causes tons of pinch flats for those running tubed tires. Relief from the rim comes as you drop off the other side into flowing singletrack again that leads to Stoneaxe hill which is a tough but short climb.
Shortly after Stoneaxe there is a technical, ledgy drop that has gotten pretty ugly with multiple lines developing. Straight down the middle is still the line of choice. Some smooth, fast trail leads you slightly uphill back to the junction with the main Phil's trail just where you drop into the Ribcage.